portus: print the environment variables in debug
portus: print the environment variables in debug

If the log level is set to "debug", then we should also print the
environment variables being set, since it might be important to check
what were the final settings.

Signed-off-by: Miquel Sabaté Solà <b4d70704b9e7df580cab34510621dbd0aacb2dfd@suse.com>

openSUSE/docker-containers